/*
 * Copyright (C) 2005-2011 MaNGOS <http://www.getmangos.com/>
 *
 * Copyright (C) 2008-2011 Trinity <http://www.trinitycore.org/>
 *
 * Copyright (C) 2010-2011 ProjectSkyfire <http://www.projectskyfire.org/>
 * 
 * Copyright (C) 2011 ArkCORE <http://www.arkania.net/>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#ifndef _AUTH_BIGNUMBER_H
#define _AUTH_BIGNUMBER_H

#include "Common.h"

struct bignum_st;

class BigNumber {
public:
	BigNumber();
	BigNumber(const BigNumber &bn);
	BigNumber(uint32);
	~BigNumber();

	void SetDword(uint32);
	void SetQword(uint64);
	void SetBinary(const uint8 *bytes, int len);
	void SetHexStr(const char *str);

	void SetRand(int numbits);

	BigNumber operator=(const BigNumber &bn);

	BigNumber operator+=(const BigNumber &bn);
	BigNumber operator+(const BigNumber &bn) {
		BigNumber t(*this);
		return t += bn;
	}
	BigNumber operator-=(const BigNumber &bn);
	BigNumber operator-(const BigNumber &bn) {
		BigNumber t(*this);
		return t -= bn;
	}
	BigNumber operator*=(const BigNumber &bn);
	BigNumber operator*(const BigNumber &bn) {
		BigNumber t(*this);
		return t *= bn;
	}
	BigNumber operator/=(const BigNumber &bn);
	BigNumber operator/(const BigNumber &bn) {
		BigNumber t(*this);
		return t /= bn;
	}
	BigNumber operator%=(const BigNumber &bn);
	BigNumber operator%(const BigNumber &bn) {
		BigNumber t(*this);
		return t %= bn;
	}

	bool isZero() const;

	BigNumber ModExp(const BigNumber &bn1, const BigNumber &bn2);
	BigNumber Exp(const BigNumber &);

	int GetNumBytes(void);

	struct bignum_st *BN() {
		return _bn;
	}

	uint32 AsDword();
	uint8* AsByteArray(int minSize = 0, bool reverse = true);

	const char *AsHexStr();
	const char *AsDecStr();

private:
	struct bignum_st *_bn;
	uint8 *_array;
};
#endif
